CN110529346A - A kind of big MW grades of low-speed direct drivings wind-driven generator shafting structure - Google Patents
A kind of big MW grades of low-speed direct drivings wind-driven generator shafting structure Download PDFInfo
- Publication number
- CN110529346A CN110529346A CN201910822512.9A CN201910822512A CN110529346A CN 110529346 A CN110529346 A CN 110529346A CN 201910822512 A CN201910822512 A CN 201910822512A CN 110529346 A CN110529346 A CN 110529346A
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- Prior art keywords
- bearing
- dead axle
- grades
- big
- driven generator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims description 8
- 230000013011 mating Effects 0.000 claims description 7
- 239000004519 grease Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 13
- 230000009977 dual effect Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0691—Rotors characterised by their construction elements of the hub
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/70—Bearing or lubricating arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a kind of big MW grades of low-speed direct driving wind-driven generator shafting structures, including together in the shaft on wheel hub and together in the dead axle on mainframe, the upwind bearing and lower wind direction bearing of support shaft rotation are set between shaft and dead axle, the cross section of the dead axle side wall is in oblique domes, and upwind bearing and lower wind direction bearing are respectively arranged on two ends of oblique domes.The present invention dead axle of oblique domes design and shaft, the structure with dual bearing structure can reduce the relative deformation of shafting, improve the service life of bearing.
Description
Technical field
The invention belongs to wind-driven generator fields, are a kind of big MW grades of low-speed direct drivings wind-driven generator shaftings specifically
Structure.
Background technique
Currently, since using energy source and environmental problem have become the major issue that Global Sustainable Development is faced, herein
On the basis of, wind energy can not only be effectively reduced as a kind of renewable and free of contamination green energy resource, large-scale development and utilization
The use of fossil resources, moreover it is possible to protect environment, reduce greenhouse gas emission, therefore, to realize global economy sustainable development
Greatly develop the necessary choice that wind energy has been current social today.In wind-driven generator field, slow-speed of revolution direct-drive wind power generation
Machine development is quick, and demand of the market to big MW grades of slow-speed of revolution direct wind-driven generator is more and more, especially marine straight drive
The power of wind-driven generator is more much larger than land wind-driven generator, due to sea to maintenance, repair, replacement of blower etc. very
Difficulty, therefore it is required that the motor reliability of design wants height, projected life longer than land motor.And electric machine structure axis architecture
Reliability be the entire motor safe and stable operation of relationship most important structure, can especially bearing steady in a long-term and reliable
Operation.
In the prior art, wind-driven generator shafting structure includes the dead axle for supporting shaft rotation, shaft and dead axle respectively
Together on wheel hub and mainframe, in use, being rotated by upwind bearing and lower wind direction bearing support shaft, such as existing patent document
The spindle support structure of CN204419878U(Large-scale Wind Turbines, 2015.06.24) and existing patent document
CN103518062A(wind turbine rotor shaft support structure, 2014.01.15) disclosed in axle support structure.In actual moving process
In, in order to reduce bearing operation risk, to guarantee that the rigidity of bearing peripheral structure is matched with bearing, not only to reduce temperature to axis
The influence held, it is also necessary to guarantee that lubrication is good, however, not recording corresponding solution in the prior art and but.
Be worth reference as existing patent document CN102270900A (megawatt direct drive type low-speed permanent magnet wind,
2011.12.07) the axle support structure recorded, to stablize its wheel rotation, by the way of internal rotor, i.e., by armature spindle
It is mounted on and is determined on main shaft by way of duplex bearing, armature spindle and determine the structure that main shaft is all made of conical hollow axis, in the structure
In, the taper setting of conical hollow axis has an impact the stress condition of its fore bearing, therefore, which is set as 0.35-
When between 0.40, then it is avoided that its fore bearing causes reduced service life because stress is excessive.
Based on the above situation, to guarantee bearing arrangement operation and use steady in a long-term, the present invention comes into being.
Summary of the invention
The purpose of the present invention is to provide a kind of big MW grades of low-speed direct driving wind-driven generator shafting structures, by dual bearing structure
The dead axle and shaft, the structure for cooperating oblique domes design can reduce the relative deformation of shafting, and that improves bearing uses the longevity
Life.
The present invention is achieved through the following technical solutions: a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure, including
Together in the shaft on wheel hub and the windward for setting support shaft rotation together in the dead axle on mainframe, between shaft and dead axle
To bearing and lower wind direction bearing, the cross section of the dead axle side wall is in oblique domes, upwind bearing and lower wind direction bearing point
Not She Yu oblique domes two ends.
The inclined direction of the oblique domes is extended by the downward wind direction bearing of upwind bearing.
The tilt angle of the interlude of the oblique domes is 4-7 °.
The upwind bearing passes through at least two adjacent mating surfaces and shaft contacts, sets down between adjacent mating surface
Angle corresponds to and sets inclined interior c-type chamfering at the shaft of chamfering.
The upwind bearing and lower wind direction bearing are axially sequentially arranged along shaft, and Yu Suoshu shaft is equipped with limitation windward
The bearing press ring moved axially to bearing and lower wind direction bearing.
The upwind bearing and lower wind direction bearing are set on the inside of dead axle.
The lower wind direction bearing diameter is 0.92-1 times of upwind bearing diameter.
The lower wind direction bearing is located at dead axle and mainframe the underface in the face of conjunction.
The dead axle end of the corresponding mainframe side sets hook-like configuration, which is located at dead axle and mainframe conjunction
The lower section in face.
The roller end of the corresponding wheel hub side and dead axle end set bearing grease seal area, and sealing surface is more broken lines
Sealing ditch.
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
(1) present invention uses dual bearing structure, and upwind bearing wind direction bearing consistent or lower with lower wind direction bearing size is than upper
Wind direction bearing is smaller, and wind direction bearing diameter specific as follows is 0.92-1 times of upwind bearing diameter, can greatly shorten bearing
Span reduces the bending deformation for determining shaft, reduces influence of the temperature to bearing life, while also ensuring the gas between rotor
Gap stability.
(2) in the present invention, dead axle is designed using oblique domes, utilizes the inclined direction and tilt angle of oblique domes
Be related to, carry out the transmission path of optimized force, help to improve the bending resistance of dead axle.
(3) in the present invention, upwind bearing and lower wind direction bearing is set on the inside of dead axle, the inner ring of shaft and bearing is connect
It touches and shaft is driven to rotate, when specifically used, use inclined interior C in the chamfering position that shaft is contacted with upwind bearing inner race
Type chamfering, the inclined interior c-type structure can maximumlly improve the size of chamfering (chamfering of upwind bearing inner race), and improving should
The stock utilization of position, the stress for reducing the position are concentrated；Also ensure that the shoulder block width dimensions design of bearing is being closed simultaneously
In the range of reason.
(4) present invention using lower wind direction design bearing in such a way that dead axle and mainframe are immediately below conjunction face, it is reasonable sharp
With stress transfer path, the stress for the chamfering position that lower wind direction bearing is contacted with dead axle can be greatly reduced.
(5) in the present invention, the dead axle anti-drive end position below conjunction face is set using hook in corresponding dead axle and mainframe
Structure is counted, while guaranteeing the rigidity of structure, the weight of dead axle can be reasonably reduced, improve motor economy.
(6) present invention designs bearing grease seal area in dead axle and shaft driving end, and the sealing ditch of especially more broken lines is close
Envelope, it is ensured that the good lubrication of bearing improves the service performance of shafting structure.
In conclusion the shafting structure that the present invention uses can shorten bearing span, the stress for reducing the region of high stress is concentrated
Coefficient greatly improves the rigidity of shafting structure, reduces influence of the temperature to bearing, guarantees the good lubrication of bearing, improves axis
Hold service life；The air gap stability for also ensuring motor simultaneously, improves the comprehensive performance of motor.
Detailed description of the invention
Fig. 1 is the cross-sectional view of shafting structure of the present invention.
Fig. 2 is the enlarged diagram of A shown in Fig. 1.
Wherein, 1-wheel hub, 2-shafts, 3-mainframes, 4-dead axles, 4.1-interludes, 5-upwind bearings, 6-
Lower wind direction bearing, 7-mating surfaces, 8-chamferings, 9-interior c-type chamferings, 10-bearing press rings, 11-hook-like configurations, 12-sealings
Ditch.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment:
The present embodiment is related to a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure as shown in Figure 1.
As shown in Fig. 1 structure, which passes through and is set between the two in such a way that dead axle 4 and shaft 2 are arranged
Upwind bearing 5 and lower wind direction bearing 6 support shaft 2 rotate, can according to specific implementation situation, determine using bearing inner race revolve
Turn or bearing outer ring rotation design structure or upwind bearing 5 and lower wind direction bearing 6 setting position, such as
In one embodiment, the design of bearing inner race rotation can be used, i.e., dead axle 4 is sheathed on outside shaft 2.In another embodiment
In, the mode that upwind bearing 5 and lower wind direction bearing 6 are set gradually along shaft 2 can be used, since shaft 2 is together in wheel hub 1
On, dead axle 4 is together on mainframe 3, when it is implemented, being arranged upwind bearing 5 in nearly 1 side of wheel hub, lower wind direction bearing 6 is set
It sets in nearly 3 side of mainframe.
For the stability and bending resistance for improving shafting structure, dead axle 4 is designed using oblique domes, i.e., such as Fig. 1 institute
Show, the cross section of 4 side wall of dead axle is designed as oblique domes, upwind bearing 5 and lower wind direction bearing 6 are then respectively arranged on askew arch
Two ends of shape structure.When it is implemented, can tilt angle to oblique domes and angled manner be defined, with optimization
The transmission path of power, therefore, in one embodiment, the inclined direction of oblique domes can be by the downward wind direction of upwind bearing 5
Bearing 6 extends, at this point, upwind bearing 5 is positioned close to 1 side of wheel hub, lower wind direction bearing 6 is positioned close to 3 side of mainframe.In
On the basis of this, further askew arch shape tilt angle is defined, the bending resistance for improving dead axle 4 is also necessary,
Such as in one embodiment, the tilt angle design of the interlude 4.1 of oblique domes can specifically be adopted in 4-7 ° of range
With 4 °, 5 °, 6 °, 7 ° or other possible angular ranges.
When using bearing inner race Rotation Design, shaft 2 is contacted and is propped up with upwind bearing 5 and lower 6 inner ring of wind direction bearing
It supports shaft 2 to rotate, is concentrated to reduce the stress of bearing and axis contact position, need to improve the contact position, especially
The contact position of upwind bearing 5 inner ring and shaft 2.Such as in one embodiment, make upwind bearing 5 by least two
Adjacent mating surface 7 is contacted with shaft 2, and structure as shown in Figure 2 specifically can be used, adjacent by two of 5 inner ring of upwind bearing
Mating surface 7 contacted with shaft 2, set chamfering 8 between the adjacent mating surface 7, and set and incline at the shaft 2 of corresponding chamfering 8
Oblique interior c-type chamfering 9.When actual implementation, tilt angle is maximumlly to improve 8 size of chamfering and improve the material benefit of the position
Subject to rate.Or in another embodiment, by lower wind direction bearing 6 be set to dead axle 4 and mainframe 3 the face of conjunction just under
Side, to optimize the stress for the chamfering position that lower wind direction bearing 6 is contacted with dead axle 4.
In shafting structure as shown in Figure 1, due to using dual bearing structure, to guarantee between bearing service life and rotor
Air gap stability, can the design size in one embodiment to upwind bearing 5 and lower wind direction bearing 6 be defined,
For example, keeping the wind direction bearing 6 consistent or lower with lower wind direction 6 sizes of bearing of upwind bearing 5 more smaller than upwind bearing 5, specifically
When implementation, lower 6 diameter of wind direction bearing is set as 0.92-1 times of 5 diameter of upwind bearing, can greatly shorten bearing span.When
It so, is preferably to promote the use of dual bearing structure, it in one embodiment, can be by the bearing pressure that is arranged in shaft 2
Circle 10, to limit the axial movement of upwind bearing 5 and lower wind direction bearing 6.
For shafting structure described in the present embodiment, in addition to said structure design, end and dead axle also are driven to shaft 2 respectively
The structure of 4 anti-drive ends is improved, to further increase certain characteristic properties of shafting structure, for example, implementing at one
In example, end is driven in shaft 2, that is, corresponds to 2 end of shaft of 1 side of wheel hub, the axis of 2 end of shaft and the design of 4 end of dead axle
Grease seal area is held, sealing surface is designed as the sealing ditch 12 of more broken lines as shown in Figure 2, to guarantee the good lubrication of bearing,
Meanwhile improving the service performance of shafting structure.In another embodiment, in 4 anti-drive end of dead axle, i.e. corresponding host frame 3 one
4 end of dead axle is designed as hook-like configuration 11, and the hook-like configuration 11 is made to be located at dead axle 4 and mainframe by 4 end of dead axle of side
The lower section in 3 conjunction faces, rationally reduces by 4 weight of dead axle.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit any simple modification to the above embodiments of the invention, equivalent variations, protection of the invention is each fallen within
Within the scope of.
Claims (10)
1. a kind of big MW grades of low-speed direct drivings wind-driven generator shafting structure, it is characterised in that: including together in turn on wheel hub (1)
Axis (2) and handle set the upper of support shaft (2) rotation together in the dead axle (4) on mainframe (3) between shaft (2) and dead axle (4)
Wind direction bearing (5) and lower wind direction bearing (6), the cross section of dead axle (4) side wall are in oblique domes, upwind bearing (5)
Two ends of oblique domes are respectively arranged on lower wind direction bearing (6).
2. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 1, it is characterised in that: described
By upwind bearing (5), wind direction bearing (6) extends the inclined direction of oblique domes downwards.
3. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 2, it is characterised in that: described
The tilt angle of the interlude (4.1) of oblique domes is 4-7 °.
4. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 1, it is characterised in that: described
Upwind bearing (5) is contacted by least two adjacent mating surfaces (7) with shaft (2), sets chamfering between adjacent mating surface (7)
(8), inclined interior c-type chamfering (9) is set at the shaft (2) of corresponding chamfering (8).
5. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 1, it is characterised in that: described
Upwind bearing (5) and lower wind direction bearing (6) are axially sequentially arranged along shaft (2), and Yu Suoshu shaft (2) is equipped with limitation windward
The bearing press ring (10) moved axially to bearing (5) and lower wind direction bearing (6).
6. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 1, it is characterised in that: described
Upwind bearing (5) and lower wind direction bearing (6) are set on the inside of dead axle (4).
7. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 1, it is characterised in that: described
Lower wind direction bearing (6) diameter is 0.92-1 times of upwind bearing (5) diameter.
8. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 1, it is characterised in that: described
Lower wind direction bearing (6) is located at dead axle (4) and mainframe (3) the underface in the face of conjunction.
9. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 1, it is characterised in that: corresponding
Dead axle (4) end of mainframe (3) side sets hook-like configuration (11), which is located at dead axle (4) and host
Lower section of the frame (3) the face of conjunction.
10. a kind of big MW grades of low-speed direct driving wind-driven generator shafting structure according to claim 1, it is characterised in that: right
Shaft (2) end of the wheel hub (1) side and dead axle (4) end is answered to set bearing grease seal area, sealing surface is more broken lines
Sealing ditch (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822512.9A CN110529346A (en) | 2019-09-02 | 2019-09-02 | A kind of big MW grades of low-speed direct drivings wind-driven generator shafting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822512.9A CN110529346A (en) | 2019-09-02 | 2019-09-02 | A kind of big MW grades of low-speed direct drivings wind-driven generator shafting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529346A true CN110529346A (en) | 2019-12-03 |
Family
ID=68666108
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910822512.9A Pending CN110529346A (en) | 2019-09-02 | 2019-09-02 | A kind of big MW grades of low-speed direct drivings wind-driven generator shafting structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677195A (en) * | 2008-09-15 | 2010-03-24 | 西门子公司 | Stator arrangement, generator and wind turbine |
| CN201739086U (en) * | 2010-06-03 | 2011-02-09 | 北京天道新源风电科技股份有限公司 | Megawatt direct-drive low-speed permanent magnet wind driven generator |
| CN201963737U (en) * | 2010-12-29 | 2011-09-07 | 上海联合滚动轴承有限公司 | Retaining frame on large-sized wind power double-line tapered roller bearing |
| CN107191474A (en) * | 2016-03-14 | 2017-09-22 | 西门子公司 | Plain bearing arrangement for wind turbine |
| CN108463632A (en) * | 2015-11-15 | 2018-08-28 | 艾德温股份有限公司 | Method and apparatus, wind turbine and method for the driving mechanism for entering the wind turbine with yielding coupling |
| US20190085827A1 (en) * | 2017-09-20 | 2019-03-21 | Siemens Gamesa Renewable Energy A/S | Method for changing a bearing component and tool device for changing a bearing component |
-
2019
- 2019-09-02 CN CN201910822512.9A patent/CN110529346A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677195A (en) * | 2008-09-15 | 2010-03-24 | 西门子公司 | Stator arrangement, generator and wind turbine |
| CN201739086U (en) * | 2010-06-03 | 2011-02-09 | 北京天道新源风电科技股份有限公司 | Megawatt direct-drive low-speed permanent magnet wind driven generator |
| CN201963737U (en) * | 2010-12-29 | 2011-09-07 | 上海联合滚动轴承有限公司 | Retaining frame on large-sized wind power double-line tapered roller bearing |
| CN108463632A (en) * | 2015-11-15 | 2018-08-28 | 艾德温股份有限公司 | Method and apparatus, wind turbine and method for the driving mechanism for entering the wind turbine with yielding coupling |
| CN107191474A (en) * | 2016-03-14 | 2017-09-22 | 西门子公司 | Plain bearing arrangement for wind turbine |
| US20190085827A1 (en) * | 2017-09-20 | 2019-03-21 | Siemens Gamesa Renewable Energy A/S | Method for changing a bearing component and tool device for changing a bearing component |
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Application publication date: 20191203 |